Comparing the effect of DSM-congruent traumas vs. DSM-incongruent stressors on PTSD symptoms: A meta-analytic review.

Experts have long debated how to define the PTSD traumatic stressor criterion. Prior research demonstrates that PTSD symptoms (PTSS) sometimes stem from events that do not meet the DSM requirements for Criterion A (e.g., divorce, bereavement, illness). This meta-analysis of 22 studies examined whether PTSS differ for DSM-congruent criterion A1 traumatic events vs. DSM-incongruent events. The overall effect was significant, albeit small, suggesting that PTSS were greater for individuals who experienced a DSM-congruent event; heterogeneity analyses also indicated further exploration. Two significant moderators emerged: assessment of both A1 and A2 (vs. A1 alone) yielded a significant effect for higher PTSS following traumas vs. stressors. Likewise, self-report assessment of life threat (Criterion A1)-vs. rater or a priori assessment of A1-yielded a significant effect for higher PTSS following traumas. Our results indicate that higher levels of PTSS develop following traumas, and highlight important methodological moderators that may affect this relationship.